VIP impersonation with BEC language (near match, untrusted sender)

type.inbound
and any($org_vips,
        0 <= strings.ilevenshtein(sender.display_name, .display_name) < 4
)
and any(ml.nlu_classifier(body.current_thread.text).intents,
        .name == "bec" and .confidence in ("medium", "high")
)
and (
  (
    profile.by_sender().prevalence != "common"
    and not profile.by_sender().solicited
  )
  or (
    profile.by_sender().any_messages_malicious_or_spam
    and not profile.by_sender().any_messages_benign
  )
)
// negate sharepoint notifications originating from within the org
and not (
     sender.email.email in ('no-reply@sharepointonline.com')
     and length(headers.reply_to) > 0
     and all(headers.reply_to, .email.domain.root_domain in $org_domains)
)
// negate highly trusted sender domains unless they fail DMARC authentication
and (
  (
    sender.email.domain.root_domain in $high_trust_sender_root_domains
    and not headers.auth_summary.dmarc.pass
  )
  or sender.email.domain.root_domain not in $high_trust_sender_root_domains
)

and not profile.by_sender().any_messages_benign